Phase locking for two ytterbium-doped large-core fiber lasers has been demonstrated by using a selfimaging confocal resonator with a spatial filter. Steady high-contrast interference stripes are observed. The visibili...Phase locking for two ytterbium-doped large-core fiber lasers has been demonstrated by using a selfimaging confocal resonator with a spatial filter. Steady high-contrast interference stripes are observed. The visibilities of coherent and incoherent stripes are 59% and 6%, respectively. The measured width of the central strip is in good agreement with the calculated result. For in-phase mode, the output power of the phase-locked fiber laser array is up to 113 W and corresponding slope efficiency is 38.5%.展开更多
大模场面积(LMA)多模光纤激光器的输出性能与光纤的弯曲程度有关。为研究两者之间的关系,在光纤不同弯曲直径下,对多模光纤激光器的输出性能进行了实验测量和理论计算。采用刀口法测量了不同弯曲直径下的激光光束质量因子M^2,并对每种...大模场面积(LMA)多模光纤激光器的输出性能与光纤的弯曲程度有关。为研究两者之间的关系,在光纤不同弯曲直径下,对多模光纤激光器的输出性能进行了实验测量和理论计算。采用刀口法测量了不同弯曲直径下的激光光束质量因子M^2,并对每种情况下光纤激光器的斜率效率进行了测量。光纤弯曲直径分别为285 mm, 195 mm和130 mm时,多模光纤激光器光束质量因子M^2为2．88,1．82和1．67,斜率效率为39％,35％和34％。另外,对于实验所采用的大模场面积多模光纤,理论计算了各模式损耗与光纤弯曲直径的关系。展开更多
基金This work was supported by the National Major Fundamental Research Program(973)of China(No.61359020103)the National High Technology Research and Development Program(863)of China(No.2005AA802030).
文摘Phase locking for two ytterbium-doped large-core fiber lasers has been demonstrated by using a selfimaging confocal resonator with a spatial filter. Steady high-contrast interference stripes are observed. The visibilities of coherent and incoherent stripes are 59% and 6%, respectively. The measured width of the central strip is in good agreement with the calculated result. For in-phase mode, the output power of the phase-locked fiber laser array is up to 113 W and corresponding slope efficiency is 38.5%.
文摘大模场面积(LMA)多模光纤激光器的输出性能与光纤的弯曲程度有关。为研究两者之间的关系,在光纤不同弯曲直径下,对多模光纤激光器的输出性能进行了实验测量和理论计算。采用刀口法测量了不同弯曲直径下的激光光束质量因子M^2,并对每种情况下光纤激光器的斜率效率进行了测量。光纤弯曲直径分别为285 mm, 195 mm和130 mm时,多模光纤激光器光束质量因子M^2为2．88,1．82和1．67,斜率效率为39％,35％和34％。另外,对于实验所采用的大模场面积多模光纤,理论计算了各模式损耗与光纤弯曲直径的关系。
